Incandescent-lamp socket.



F. REUTTER.

INGANDESGENT LAMP SOCKET.

APPLICATION FILED APR. 1o, 191s.

1,065,967, Patented July 1, 1913.

mue 1Mo@ UNITED sTATEsrnrENT oFFIoE.

FREDERICK REUTTR, F WATERBURY, CONNECTICUT, AssIGNoR To scovILI I'mivrgrivu-v TACTURING COMPANY, or WATERBURY, CONNECTICUT, A CQRPCRATION oF CON- NECTICUT.

INCNDasCENT-LAMIY'SOcKE'r.

Specification of Lette-rs Patent. Patented July 1v, 1913,

T ooll 'whom 'it mag/.concern i Be it known that I, FREDERICK REU'r'ram-'a lVaterbur-y, in the county of .New Haven and State of Connecticuhhave invented a Certain new and useful Improvement in lncandescent-Lamp Sockets, of Which the following is a full, clear, and exact description. v

The object of this invention is to provide a simple and economical construction of de-v tachable caps, for incandescent electric lamp sockets, of the type Where the cap is provided with interior projections which are adapted to engage slots in the shell of the socket and be held in engagement with the shell by the springiness of 'the shell, and capable of detachment therefrombyvirtue of such springiness. Various constructions have been devisedfor accomplishing this ob. ject, but all of them have been more or less expensive to manufacture.

The present invention is designed to furnish an economical and efiicient construction of socket cap of the general type referred to.

The invention consists in a cap' `for incandescent lamp sockets, having the interlocking projections formed integral therewith, 'by slotting the cap transversely in such Way as to leave intervening solid portions or strips ofthe metal of thebcap, and thenbreaking down the metal of the cap in the? direction of'the height of the capv so as to fold the metal'strips between the slots upon themselves and cause the thus folded parts to project inwardly; this breaking down of the -cap serving to substantially close the slots, zso that the cap may be used with or Withoutan exterior nishing ring, all as I will' proceed now to explain and finally Clailx;

i In thaccompa-nying drawings illustrat- I ing the invention, in the several figures of which like parts are similarly designated,

Figure l is an elevation of the socket; Fig. 2 is a top plan view thereof; Fig` is a longitudinal section with the socket and cap assembled, and Fig. 4 isa top-plan View and halfV horizontal sectiontakeu in the plane of line A B, Fig. Bf'Fig. 5 is a halfV section and ele ation of the partly formed blank from whici the cap is* made; Fig. 6 is a similar view\showing the projections formed; Fig. 7 is a'view sifilantoFig. 6 but with anV ex-.

'te'rior finishing ring applied, and Fig. 81s

an inverted plan view, all ot' these last four views being on a larger scale. Y Q

' The socket l, may have the longitudinal slit. 2, for the reception of thekey shaft, and;

its upper edge crimped or corrugated asat- 3, and these corrugations are provided .with transverse slot-s 4 of greater length` than the projections on the cap. One or more of the slots next to the slit 2 may be provided with slots o of about the dimensions of the project-ions on the cap, so` that when the cap is applied to the shell and its projections are engaged in theslots 4 and 5,'

the slots 5 will prevent any rotary motion'.

of the cap and so hold it in fixed relation rotarily with respect to the shell, while all of the several slots Li and 5 hold `it in fixed relation in the direction of the lengt-h of the shell. l

This present invention has to dowith the l formation of the projections in the cap 6.

ln the preferred procedure, the cap lis proj duced in any usual or approved Way,lwith an annular flange 7, and this flange. vis made with the slots 8 so as to lleave intervening strips 9y of the metal of the cap; and vt-hen thethus formed cap is placed in a suitable die of a character that wiltfalord an outside support for the flange 7V, and then presi sure is applied to break down the flange; and inasmuch as the strips 9 are prevented by the die from projecting outwardly, they are compelled to fold down upon themselves inwardly, as indicated in Fig. 6, thus leaving the inwardly extending projections 10, hereinbefore referred toA as lthe projections which engage the slots 4 and 5 of the shell. The breaking down of the slotted flange closes the slots, and the cap may then'be subjected to any suitable finishing operation,

and be applied to the socket shell by pressing it down upon the corrugated end of that shell 'and then turning its projections. into the slots 4 and 5, the resiliency of the shell being sufficient to yield to permit the projections to turn into the slots 4 and and then 'recoil so as to lock the shell and cap together. To release the cap the shell is pressed in on that side of the slit 2 contain` ing the slots 5, so as to release the projections from those slot-s and permit it to be rotated so as to draw the other projections out of the slots 5 and' into the grooves between the corrugations, when the c ap may be desired, the carp' besupplied with :rn 'eX'-A tei-iol" finishing band 11,` of any Y approved construction.` J

to ivhich it isevposed inrus'e.""]ft is'unnecessary to use e. supplemental ring havingpr' By the construction Vdescribed, a, cap is furnlshed ivlth integral' projections, 1n e very econoinicnl and expeditiousfvvay, and of suflicient strength vto fullysustein ynl .lstrarns jections, as has heretofore .been proposed;

and'while. Ik prefer :to formft'he projectionsV integrally Withthejleapi siichdntegmlity is not indispensable, so. long 'asgftheseprojec-V tions are Aformed by.v foldi hegrneta'l-g'upon itself., by a breakingl dow of: the l1ne tel as toi say, transversely; What I clairnffis 1. An incendescentlamp socket, having 'a cap 'provided with `txfft'ns versely'-extenling shell-engaging proj-ectiensjllformed by folding upon themselves integral portions of the metal from whichl seid projections,extend.

2. An incandescent lamp' socket cap, having inwardly extending"` transversely arranged projections .formed of the metal ofl the cap folded uponiitself.

3. An incandescent lamp socketc'ip, provided with a flange 'having alternating transverse-slots and connecting. strips, said strips folded upon themselves by breaking shell.

down the flange and thercbyconverting said stripsA into transverse lnwardly extending Vproject-ions adepted for detachable engage-A ment with an appropriatelyA formed socket An incandescent lamp socket,'having a shell provided with means for interlocking with @detachable cap, endl-a, cap -having 'transversely extending interior projections adapted to cooperate with the 'interlocking means onV the shell, said projections formed of integral portions of the metal of the shell olde'dupon themselves. .Y

5. .Aninc'andescent lampso'cliet, having a `shell-provided with a longitudinally corrugated end, divided by a longitudinal slit., said corrugated end having a series of trans? verse slots, and acap provided with a series of inwgrdly 'extending projections lformed by folding upon' Athemselves integral portions of thenietal from'vvhicli said projections extend and adapted to engage the slots in the shell, one or more of the slots in the shell next to the slit adapted to snugly fita projection on the cap so is to prevent reletiv rotation of the cap and shell.

In'testirnony whereof I have hereunto set my hand this 9th day of April A. D` 1913. FREDERICK REUTTER.

Witnesses:

P i'rnicli H. ROBINSON, Josnrrr Il. Town 4- Copies.o f this patent "ny be o btainedfo-r five cents ecli, vby addressing thev Commissioner of Patents,

` 'Washingtom D. C. 

